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So those are my three parameters:Bet piano soundBest actionUnder 40 lbs I would prefer at least 73 notes.

Have at it. Price not as important as these three factors.

Nord Piano

People complain about the action, I think it's actually pretty good, and most of the ones that people like better aren't under 40 lbs anyway.

Other possibilities:

Yamaha CP33. I don't like the action as much as Nord Piano, but some people like it. I think most people would agree that the Nord Piano has the better sound though.

Casio PX-5S coming out in a couple of months. You could check out the action by trying one of the already shipping models with the same keybed, like PX-150/350. The PX-5S will be an improvement in piano sound over those models, though.

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"I'm still an idiot and I'm still in love" - Blue Sofa - The Plugz 1981 (Tito Larriva) Disclosure : I am professionally associated with Arturia but my sentiments are my own only.

Nord Piano 2, nothing that I've played that's currently out even comes close. Maybe the Nord Electro 4HP but that's 73. Or the NS2 76 or 88 but all of those still have an inferior action to the NP2. Haven't played the Casio PX5 yet however..

Best action and sound is mostly subjective. You have to try them. I did and ended up with the CP33 and could not be happier. The action is excellent, but on the heavy side. The Yamaha piano sound is well sampled and pleasant to play.